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Determinants of Myocardial Oxygen Demand: Total Mechanical Energy and Contractility

  • Hiroyuki Suga
  • Yoshio Yasumura
  • Takashi Nozawa
  • Shiho Futaki
  • Nobuaki Tanaka
  • Masaaki Uenishi

Abstract

Many determinants (indices or predictors) of myocardial oxygen consumption (VO2) have been proposed over recent decades [1, 2]. They include peak or mean ventricular pressure, myocardial systolic force, time integrals of pressure and force, contractile element work, dP/dt, Vmax, and their various combinations including Bretschneider’s total myocardial energy requirement Et [1] and the Rooke and Feigl pressure-work index [2]. Some of them are empirical and others are theoretical. However, we do not feel satisfied with them because their correlations with VO2 are not always good under a variety of loading, heart rate, and contractile conditions.

Keywords

Myocardial Oxygen Consumption External Work Myocardial Oxygen Demand Contractile State Isovolumic Contraction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Tokyo 1988

Authors and Affiliations

  • Hiroyuki Suga
  • Yoshio Yasumura
  • Takashi Nozawa
  • Shiho Futaki
  • Nobuaki Tanaka
  • Masaaki Uenishi
    • 1
  1. 1.Department of Cardiovascular DynamicsNational Cardiovascular Center Research InstituteSuita, Osaka, 565Japan

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